Posted by Mike(NEOhio) on November 27, 2018 at 09:39:11 from (75.88.58.118):
In Reply to: gears posted by Ellis Kinney on November 27, 2018 at 07:57:38:
If you can, look at some unworn gears and get used to what the curvature of the tooth should be. Most are an involute curve with either 14-1/2 or 20 degree pressure angle. The 20 degree makes a slightly thicker and stronger tooth but the backlash increases more with wear. I look at the central area of the tooth face and compare it to the tips and roots of the tooth. With a little practice you can usually see the wear pattern there. If one gear is narrower than the other you can see the original tooth form on the wider one. You can draw an involute with a pencil and string. Tie the string to the pencil and wrap it around a can or something similar. With the pencil against the can, unwrap the string and it will draw a spiral. The first little bit of the spiral is the tooth form.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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